html,
body {
    height: 100%;
    overflow: hidden;
    font-weight: 400;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p,
blockquote, pre, abbr, address,
cite, code, del, dfn, em, img, ins, kbd, q,
samp, small, strong, sub, sup, var,
b, i, dl, dt, dd, ol, ul, li, 
fieldset, form, label, legend, table, caption,
tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details,
figcaption, figure, footer, 
header, hgroup, menu, nav,
section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
    list-style: none;
    box-sizing: border-box;
}

body {
    line-height: 1.2;
}

:focus {
    outline: 1;
}

article, aside, canvas, details,
figcaption, figure, footer,
header, hgroup, menu, nav, section, summary {
    display: block;
}

nav ul {
    list-style: none;
}

blockquote, p {
    quotes: none;
}

blockquote::before,
blockquote::after,
p::after,
p::before {
    content: "";
    content: none;
}

a {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

ins {
    background: #ff9;
    color: #000;
    text-decoration: none;
}

mark {
    background: #ff9;
    color: #000000;
    font-size: italic;
    font-weight: bold;
}

del {
    text-decoration: line-through;
}

abbr[title],
dfn[title] {
  border-bottom: 1px dotted #000;
  cursor: help;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

input, select {
    vertical-align: middle;
}

img[src=""], img:not([src]) {
    opacity: 0;
}
